System of distribution.



J. BIJUR. SYSTEM OF DISTRIBUTION.

APPLICATION FILED NOV. 18, 1911.

1,124,277. Patentd Jan.12, 1915.

llll n INVEHTOI? zen of the United States, residiii UNITED STATES PATENTc nema.

'JQBSPH BIJ'UR, OF NEW YORK, N. Y., ASSIGNOR TO THE SAFETY CAR HEATINGAND LIGHTING 00., OF NEV] YORK, N. Y., .A CORPORATION CF NEW JERSEY.

Specification of Letters Patent.

SYSTEM OF DISTRIBUTION.

Patented Jan. 12, 1915.

' Application filed November 18, 1911. Serial No. 660,946.

To all whom it may concern:

' Be it known that I, JosnPHBIJUR, a citiat New York city, in the countyof New State of New York, have invented certain new and usefulImprovements in Systems of Distribution, of which the following is afull, clear, and exact description, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates tosystems of electrical distribution, and withregard to-the more specific features thereof, to 'means for controllingthe connection of the generator with certain types of load.

One of the objects thereofis to provide practical and efiicient. meansfor controlling the connection of a generator with a load.

Another object is to provide means of the above type in which the actionis reliable underall conditions of use.

Another object is to provide means of the above type of simple andinexpensive construction. I

Other objects will be in part obvious and in part pointed outhereinafter.

The invention accordingly consists in the features of construction,combinations of elements and arrangement of parts which will beexemplified in theconstruction hereinafter set forth, and the scope ofthe-application of which will be indicated in the following claims.

The accompanying drawing is a diagrammatic view of one of variouspossible embodiments of this invention.

As conducive to a clearer understanding of certain features of thisinvention, it may first be noted that in the charging of storage- .orsecondary batteries from a generator driven at variable speed, means areoften provided to prevent an excessive voltage of the generator with acorrespondingly excessive current in the battery, this-holding truewhether the regulation of the generator be for constant voltage orconstant current or otherwise. Moreover, if connection is made betweenthe generator and a battery with the former at too low a voltage, thereis a tendency of the battery to discharge back through the generator.Accordingly, there is a somewhat limited range of Volta c with-* inwhich connection must be made or best results. and if the generatorvoltage be the controlling factor in establishing or break.

ork and ifig thisconnection, there is often a corresponding necessityfor nice adjustment and a corresponding liability of the connectingswltch not to give proper action. Obviously, with apparatus of thisnature the connection must be made and must not be made at too low avoltage of the generator, and if this invention.

Referring now to the accompanying drawing, there is shown at 1 agenerator having a shunt field winding 2, in which is serially disposedawariable resistance device 3. The resistance of the latter iscontrolled conolntly by a current coil 4 serially disposed in the main 5and a voltage coil 6 bridged across the mains 5 and 7. The action ofthis generator regulating apparatus and the features of Lconstructionthereof are fully set forth, described and claimed in my copendingapplication, Serial No. 595,070, filed December 1, 1910, and it will beunnecessary to deal with them in detail in the present case. It may benoted, however, that this regulating apparatus prevents the rise ofvoltage of the generator beyond certain predetermined values byautomatically increas ing the resistance of the device 3 and thusweakening the field as the generator speeds thence to a contact 8 whichcoacts with the ,spring retracted armature 9,to establish a circuitthrough the coil 10 and thence through the battery 11 or other load tothe main Coacting with coil 10 is a voltage coil 12 bridged acrossthemains and so wound as to tend to close the switch member 9 and actcumulatively with the coil 10 in holding.

the switch closed during the charging of the battery,

Positioned upon the switching device controlling the member 9 is acurrent coil 13 serially connected in the field circuit of the generatorand wound differentially with respect to the coil 12. These coils are sowound? and connected as to present a total resultant magnetic fieldwhich will be of current, and hence such value as to close the switch 9at the certain predetermined voltage of the generator at which thisaction is desired. It is to be noted, however, that if for any reasonthe switch '9 is .not closed at the limit of the voltage of thegenerator permitted by the f'egulating apparatus, it does not remainopen upon further increase in speed, as, although the field of coil 12may at this stage become a constant factor, nevertheless the field ofthe opposing coil 13 is further weakened, due to the cutting down of thefield the resultant field continues to increase until the switch memberis closed against the contact 8. With the switch closed, the coil 10acts in con3unct1on with this resultant field in maintaining theconnectionduring the charging of the battery.

The operation of this apparatus will be clear from the above, and it isto be noted that although it is chiefly of value in connection with thecharging of storage-batteries, nevertheless, it presentsfeatures ofadvantage when used to govern the connection of a generator of thisgeneral nature with a lamp load or the like.

It will thus be seen that there is provided apparatus in which the aimsof this invention are achieved and which is of simple construction andthoroughly dependable action. a

As many changes could be made in the above construction and manyapparently widely difierent embodiments of this invention could be madewithout departing from the scope thereof, it is intended that all mattercontained in the above description or shown in the accompanying drawingshall be interpreted as illustrative and not in a limiting sense.

I-Iaving described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In apparatus of the class described, in combination, a generator, aswitch connected in the external circuit of said generator,

means tending to close said switch, means adapted to weaken the field ofsaid generator as the speed of drive thereof increases, and meanscontrolled in accordance with the field current of said generator andopposing said switch-closing means.

2. In apparatus of the class'described, in combination, a shunt-woundgenerator, the

' field circuit of which comprises a variable resistance device, meanstending to increase the resistance of said device as the speed of saidgenerator increases a switch connected in circuit with said generator,means tending to close said switch, and means controlled in accordancewith the field current of said generator and opposing said closingmeans.

3. In apparatus circuit with said generator, and a magnet comprising apair of difierentially wound coils controlling the closing of saidswitch, one of said coils being connected to increase its field strengthas the speed of said generator increases and the other of said coilsbeing connected to decrease its field strength With increase of saidspeed.

5. In apparatus of the class described, in combination, a source ofcurrent, a switch connected-in circuit with said source of current,means controlled in accordance wit the voltage of said source of currentand tending to close said switch, means adapted to regulate the outputof said source of cur rent, and means afi'ected by said regulating meansand adapted to oppose said voltagecontrolled means.

6. In apparatus of the class described, in combination, a shunt-woundgenerator, a

main clrcuit, a coil presenting a fieldstrength substantiallyproportional to the voltage of said generator and tending to close saidswitch, auxiliary means comprising a coil traversed by the field currentof said generator and adapted to coact with said first coil in closingsaid switch and an automatically controlled variable resistance seriallyconnected with said last coil in the field circuit, said voltage coilbeing connected in parallel with respect-to the field circuit of thegenerator. I

7. In apparatus of the class described, in combination, a shunt-woundgenerator, a main circuit, a switch in said circuit, a storage batteryconnected in said circuit, and magnetic means tending to actuate saidswitch comprising a voltage coil connected across said generator, aseries coil connected in sail circuit and a coil connected inthe fieldcircuit of said generator opposing said voltage coil.

8. In apparatus of the class described, in combination, a generator, :1storage battery adapted to be charged thereby, a switch conacross tlgenerator, a current coil serially disposed Y n the circuit leadingtosaid battery. andmeans adapted upon increase of of the class described,in generator speed to increase the effective field of said voltage coilat a rate that of said speed increase.

9. In apparatus of the class described, in combination, a generator, astorage battery 5 adapted to be charged thereby, a switch controllingthe circuit from said generator to said battery, and controlling meansfor said switch, comprising a voltage coil connected across thegenerator, a current coil serially disposed in the circuit leading tosaid battery and an auxiliary device opposing the action of said voltagecoil with a force which decreases as the speed of said generatorincreases. 10. In apparatus of the class described, in combination, agenerator, regulating means for said generator a storage battery adaptedto be charged thereby, a switch controlling the circuit from saidgenerator to said battery, and controlling means for. said switch,comprising a voltage coil'connec'ted across the generator, a currentcoil serially disposed in the circuit leading to said battery and a coilconnected in parallel with said first-mentioned coil and Wound to actdifferentially with respect to said series coil -durin the charging ofsaid battery.

greater than 11. 11 an apparatus of the class described,

in combination, a generator, a storage battery adapted to be chargedthereby, a switch controlling the circuit from said generator 'to saidbattery, and controlling means for said switch, comprising a voltagecoil connected across the generator, a current coil serially disposed inthe circuit leading to said battery and a coil connected in the fieldcircuit of said generator and wound to act differentially with respectto said series coil during the charging of said battery. 7.

12. In apparatus of the class described, in 40 combination, ashunt-wound generator, a variable resistance device connected in thefield of said generator, means varying the resistance of said device asthe output of said generator varies, a storage battery adaptedto becharged from said generator,

a switch controlling the circuit between said generator and saidbattery, and elect; o-

-magnetic means controlling said switch and comprising a voltage 0011connected across 56 said generator, a coil wound differentially withrespect to said voltage coil and onnected to present a fieldsubstantially proportional to the current flowing through the field ofsaid generator and a current coil serially connected between saidgenerator and said battery.

In testimony whereof I afiix my signature in the presence of twowitnesses.

JOSEPH BIJUR.

Witnesses:

P. A. BLAIR, L. A. WATSON.

